Pigment with basis of calcium cyanamid and process of making same.



UNITED STATES PATENT OFFICE.

IOBIB'IO FULLONI, OF EDIE, ITALY.

PIGIEN'I' WII'H BASIS OI CALCIUM CYANAIID ID P500888 0! XAIING m1.

In Drawing.

To all whom it mu y concern:

Be it known that I, ltunan'ro Ft must, a sub'ect of the Kin of Italy, and residing at 06 'ia Due Macei l Specification of Letters Patent.

Application filed March H, 1810. will 10. H.312.

vented certain new and useful l'mproicments Ill Pigments with Basis of Calcium (yanainid and Process for Making which the following is a specification.

b'alne,of

of calcium cyanamid or other cyanamid salts I as basic material in the production of pigments. It is based on the discovery that a solution of a salt of a heavy, metal acting on calcium cyananud or other cyanauud salts will )roduce durable and insoluble subi stances w iich-abstracted from the colorin preparinf paints and coatings for rovering iron an other metals, wood etc.

Experiments which have been carried on for more than a year have shown that the new pigments are distinguished by the followin qualities: inalterability; resistance to aci s and acid emanations; resistance to 1 heat and low temperatur s; resistance to water. e en if containing saline solutions; I adhesion and solidity: covering capacity superior to that of lead preparations. density of these pigments, those whose base is formed cyananiid and sulfate of cop ier or sulfate The for instance of y raw calcium of zinc) stands to that of t e minium in f limit the applications or systems of application of the process itself. either with regard to the choice of the cyanamid and metallic salts used and their proportions, or with regard to the modes of fabrication, the duration of the o -rations or the temperature under which t ey have to be carried out etc.,

steps in the process being susceptible to variations according to whether one or another cyanamid salt, or one or another metallic salt-or several salts to et-her.

In a metallic receiver, preierably of 0gpl'heir covering Patented May 3, 1910.

(by weight) of sulfate of copper are disi, Rome, Italy, have insolved in about T50 parts of water and then 1000 parts ol" raw calcium cyunamid are oured into (lib solution. The mass is then stirred rapidlv and continuously for about two hours antlmaintaincd during the opera- The present invention relates to the use tion at a temperature of from 50 to C. The ltlllxs' is then poured into another similar receiver (provided with cover) where it is left to rest for about 24 hours. After haviug sub'ct-ted the product to a rou h grinding tlllt having spread it out -in ayers of three to five centimeters thick on glass or similar plates, it is placed to dry in a room can be advantageously substituted for the .imnium and other mineral substan es used in Will"! the tem aerature is maintained at from 3 to 40" AS as the pmduct i.-. t-omph-tt-lv dry it has only to be subjected to a careful grinding in order to bring it into that tate of impalpability which is reuired from every pi ment for its uicker and more perfect com iination with 0115 etc.

What I claim and desire to secure by Letters-Patent is:

l. basic material f0! paints consisting of a salt of cyanamid in combination with a metallic salt.

2. In a paint. the combination of a vehicle and a -alt of cyanamid.

3. In a paint. the combination of a vehicle. a salt of cyanamid and a metallic salt.

4. In a paint. the combination of a vehit'lt. calcium cyanamid and a metallic salt.

5. In a paint. the combination of a vehi- (:le, calcium cvanamid and a sulfate of a metal.

0. The prtavcss of we iarin a basic ingredient for paints w ici inc udes treating a salt of cvanamid with a solution of a metallic salt.

7. The process of preparing a basic ingredient for ppints consisting in forming a solution of a metallic salt and combining therewith a salt of a cyanamid.

8. The process of preparing a basic ingredient for paints consisting in forming a solution of a metallic salt and oombin therewith a salt of a cyanamid under the l l l l action of heat.

9. The process of preparing a basic ingredientfor paints, consisting in dissolving 850 parts by weight, of sulfate of copper, in

- 750 parts by weight, of water, adding thereto 1000 parts by weight, of calcium cyanamid, stirring the mixture while maintaining it at a tem rature up roximatinql 60 da grees 0., :n drying an grinding t o prodnet 90 formed.

10. The process of pmparing I basic ingradient for paints oonsistin in dissolving 60 parts by weigh of sul te of copper, in '2'50 parts b Wei t of watqr, and adding thereto 1 pa cyanamid, stirring the mixture while maintaining it at a temperqture .approximating 60 (1 w 0., allowing the resultant mass by waight, of calcium oazm to rest for g. rind of timm, subg a-conm gmnfifng drying it, an sub; it to a final In witness whereof, mid Roanm Fm 5 mm has signed this specification at Rome in the Ki cm of Italyihis 25th day of February 1 10.

ROBERTO FULLONH. In the presence of two w;

W. W. Vmmmmx, ,CQNBTAN'TXNO FBANCIENY. 

